11 Wcdma Rnp&Rno Conspectus

7/29/2019 11 Wcdma Rnp&Rno Conspectus

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WCDMA RNP&RNO

Conspectus


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Main Topics WCDMA RNP Principles and

Procedures

WCDMA RNO Principles andProcedures


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WCDMA RNP Overview

WCDMA Radio Network Dimensioning

WCDMA Nominal Planning

WCDMA Final Design

WCDMA RNP Principles and Procedures


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RNP Definition

According to deployment and evolution requirements, aswell as cost-effectiveness consideration, generate the

amount of Network Elements (NE), NE configuration, and

Transmission design between different NE.

Network Planning Scope Core networkfocus on CN element dimension

and configuration.

Radio networkfocus on RAN

element dimension and configuration

Transmission network

focus on link dimension and

configuration between network elements.

RNSRNC

RNSRNC

Core Network

Node B Node B Node B Node B

Iu Iu

IurIub IubIub Iub

Definition & Scope

WCDMA k l i


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WCDMA network planning

solution WCDMA Radio network planning

(NodeB/RNC)

WCDMA Transmission network planning

(Iu/Iur/Iub) WCDMA Core network planning (CS/PS

domain)

WCDMA RNP tools development

U-NetHuawei

Network KPI

Pilot pollution

Soft-handover ratio and probability

Access probability of

different services

Best Server Distribution

CE dimension

Estimation result


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Objectives of network planning

The RF Design of wireless system revolves four

main principles. These principles are Coverage,

Capacity, Quality and Cost. And further, adapt to

the future network development and expansion.


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WCDMA RNP procedure

overview

Capacity

Quality Coverage

Interference

Final design

preparation

Dimensioning Nominal Planning

Site survey

Deployment

Detailed planning

Preliminary design


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WCDMA RNP Overview


WCDMA Preliminary Design

WCDMA Cell Planning

CONTENTS


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Input & Output

Coveragerelated

Coverage area

Coverage

probability

Capacity related Traffic model

Service model

User density

Quality related QoS

requirements

GoS

requirements

Demodulationthreshold

System

dimensioning Number of sites

Systemconfiguration Sector structure

Number of

carriers

Cost on networkconstruction

Site cost

Equipment cost

Input Output

Coverage design

Capacity design


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WCDMA RNP Overview



WCDMA Final Design

CONTENTS


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Nominal Planning

Based on the result of network dimension,

preliminary design present Information oftheoretical sites including following :

Site coordinates.

Engineering parameters such as Antenna height,azimuths and tilts.

Radio parameters such as scrambling code ,transmit

power of different channels, etc.


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chart

Radio

Network

Dimensioning

Dimensioning

Report

Contract

Initial sites

choosing

System

simulation

Target

Size

Phase No.

Available sites

information

Site adjustment?

Y

N

Bidding

Document

Sites importingPropagation

model

Nominal planning report

(Including: search ring and

Theoretical site specification)


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About simulation Unlike GSM network, in CDMA coverage and capacity are too

inter-related to be predicted accurately, so we introduced Monte

Carlo simulation to evaluate the performance of a radio network.

EcEc/Iopilot pollution distribution

Soft (softer) handover area analysis UE transmit power

Eb/No, access successful rate of each service

WCDMA simulation


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Simulation output

Simulation output Pilot coverage (Ec, Ec/Io) in the

target areas

Best server plot

Coverage probability distribution

of each service Access failure distribution and

statistic of each service

Continuous coverage areas ofeach service

Cell load distribution of downlinkand uplink

Pilot pollution distribution

Soft handover areas statistic ofeach service


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Preliminary design output

Project background introduction

Target areas information such as population, district division etc.

Radio network solution: sites distribution plot, sites list etc.

Performance summary based on the simulation result.

Annex: simulation output

In preliminary design stage, we choose initial sites, do network performance

simulation, conduct adjustment according to the simulation result, until

finally we get all performance requirements fulfilled, then we can output the

with

following contents:


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WCDMA RNP Overview



WCDMA Final Design

CONTENTS


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-chart

Site list

Radio network

preliminary plan

report

New site or not2G site or not

Output SearchRings

Identifytheoreticalsite

Confirm site

conditions

or not

Site survey report

Meet site

requirements

or not

Yes

Site survey

No

Yes

Yes

No

Yes

No

No

Noise test Noise test report

Based on the preliminary design report,

we conduct more detailed cell planning.


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For each theoretical site, a physical site will be acquired

in this phase through following steps:

Define search areas

Site ranking

Identify candidate sites

Site acquisition

Site Survey

A suitable physical site

Give adequate radio coverage.

Have connectivity into the transmission network.

Be aesthetically and politically acceptable to the local community.

Have power nearby, good access and a co-operative owner.

A3rd

D1st

C2ndB - Unsuitable


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Site Survey report The surveyor will prepare a report listing

the options, and following items willincluded in the report:

Accurate grid reference.

Accurate height of structures or available antennawindows.

Photographs of the site.

360 panoramic photos from site or if obstructed

from nearby location/structure.

From site survey report, RNP engineers can derive

appropriate site location, antenna type,height, azimuth, down tilt, etc.

er ca on y sys em


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er ca on y sys emsimulation

It is an iterative

process to verifythe final design

until all the

requirements are

fulfilled Coverage prediction

RNP

Planningresults

Are

Requirement

s Fulfilled?

Traffic distribution System simulation

WCDMA RNP t t


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WCDMA RNP output

LAC, RAC, SAC Plan

Neighbor relation plan (intra-frequency, inter-

frequency, and inter-system)

Frequency plan

Scrambling code plan

Power allocation for each channel

Handover parameters

Access control parameters

Other radio parameters

After performance verification by simulation, we produce with more detailed contents. In order to guide the project

implementation, the report should also include following items

C


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WCDMA RNP summary


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Main Topics WCDMA RNP Principles and

Procedures

WCDMA RNO Principles andProcedures


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WCDMA RNO Principles and

Procedures Brief Introduction

Single Site Verification

Radio Frequency Optimization Parameters Optimization

Regular Testing & KPI Analysis

e wor p m za on


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To enhance networkperformance

--- e.g.

coverage/accessibility/mobility

To resolve specific issues

--- e.g. interference/coverage To improve subscribers

QoE

--- e.g. service quality/drop

e wor p m za onTarget


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Construction phaseTroubleshooting

Booming phasePotential Seeking

Mature phaseBalancing

Time

Subs.Number

RF plan review

Single site verification

Pre-launch optimization

KPI analysis ComplaintsDT & CQT

Customized and

differentiated

services

Billing strategies

Drop call

Congestion

Poor quality

Access failure

RF adjustment

Para. adjustment

Maintenance and upgrade

Network expansion

.

Investment

Return

Commerciallaunch

Optimization throughout Life Cycle


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Network Optimization Phases

RF optimization

Y

N

N

Y

Single site verification

80 sites in the

cluster ready?

Service test and

parameter optimization

Routine drive test andstats. analysis

Acceptance criteriasatisfied?

New site integrated

Optimization

preparation

Acceptance

w z


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w zPhasesSingle site verification

To verify the functionality of new

sites

--- e.g. site installation, basic

functions of the cell

RF optimization To control interference & pilot

pollution

To optimize coverage & 3G

neighbor lists

Services test & para.optimization To assess network performance

To optimize network parametersRegular route testing &

stats. analysis To monitor & evaluate network

performance

To identify & solve new networkissues


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Brief Introduction





Procedures


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Site Verification TargetTo verify cell coverage

CPICH RSCP

To investigate

interference

NodeB RTWP & CPICH Ec/Io

To verify site

installation

e.g. PA/antenna/feeders issues

Example: Site Verification


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An example Check list

Example: Site Verification

Checklist

Single Site Verification Checklist

Site expanded from:

Site migrated from RNC:

New site Expansion

Site Connected to RNC:

Idle mode

Note: If the item is OK, mark the "" before it by "" otherwise, mark the"" by "". If the item is not check, mark the "" before it by "/".

HSDPA 10 Normal function to access HSDPA

Migration Others

New Site:

Site Expansion:

Reminder

Mapinfo Update

Data Base Update

To:

To RNC:

Site Name:

Remarks

CPICH_RSCP > 75 dBm near site

Coverage DT 9 Check by DT whether the overall quality of service and cov

Connected mode

6

Mobile originated and terminated calls of VP service

8 Connection of PS services

Mobile originated and terminated calls of voice services

7

CPICH_EcIo > 8 dB near site

Site ID:

No. Activity/Process

Site Migration

Others

3 LAC/RAC data configuration

1

4

2 Scramble configuration

Frequency configuration

5

Remarks (further explanation):

2-Name/Designation: Signature: Date:

Reviewed by:

1-Name/Designation: Signature: Date:

X

r nc p es an


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Brief Introduction




r nc p es anProcedures


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RF Optimization Target

To optimize coverage

To minimize pilot

pollution

To optimize celldominance

To o timize nei hbor cell


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RF Optimization ProcedureDrive test

Identify RF issues

Identify candidate

cells for changes

Identify nature of

required changes

Determine amount

of changes

Implement changes

Repeat drive test

Finished

N

Problem resolved?

Y


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RF Parameters Optimization

Engineering parameters

adjustment To adjust antenna down tilt To adjust antenna azimuth

To adjust antenna location

To adjust antenna height

To replace antenna

To replace site

To add new cell

Radio part parameters

adjustment To optimize neighbor cell list

RF related Drop Calls


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RF-related Drop Calls

Poor coverage

High interference

Poor UL coverage

Poor dominance

Pilot pollution

Missing neighbors

Problems

Fast change of RF conditions usuallycauses drop calls, e.g. turning a corner.

Poor RSCP & Ec/Io

Poor Ec/Io or RTWP

UE max Tx power

many SHO events

many cells present

Appearance

WCDMA RNO P i i l d


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Brief Introduction


Radio Frequency Optimization

Parameters Optimization



Procedures

Para Optimization


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Para. OptimizationTarget

To reduce access

failures

To reduce drop calls

To enhance service

quality

Para. optimization

is an important step

after RF optimization

Service quality and network resourcesutilization

will be improved after para. optimization

Parameters to be


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Parameters to beOptimized

CCCH power allocationpara.

RL maximum power

para.

Cell re-selection para.

Intra-freq. handover

para.

Inter-RAT handover para.

Power control para.

Access power para.

Other related para.

The influence caused by the cell

parameters adjustment shouldbe analyzed carefully.

Seldom adjusted

An effective way to

reduce drop calls



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Brief Introduction





Procedures

Regular Drive Testing Target


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Regular Drive Testing Target

To get benchmark of the

performance of the networkand users experience

To monitor the progress of

on-going optimisationactivities

To validate new features of

the RAN To identify degradation in

coverage and/or increase in

interference

call setup SR,

call drop rate,PS throughputs

As a result of increasedtraffic or changes inenvironment

Routine drive tests should becarried out (e.g. on monthly)

Routine Stats Analysis


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Routine Stats. Analysis

Target

To benchmark networkperformance

To monitor traffic volumes &

patterns To assess impact of

parameter changes

To identify poorlyperforming cells

To provide triggers for

network upgrade decisions

ro ess ona p m za on


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MSC/SSP/VLR

HLR/AC

GMSC/SSP

PSTNPLMNISDN

iManagerTM M2000

GENEXNastar

GENEXAssistant

GENEXProbe

CN

Node B

Node B

Node B

RNC

RNC

Node B

Node B

Node BRNS

RNS

GENEX Probe

AGILENT

QUALCOMM

HUAWEI RNC

ro ess ona p m za onTools

Performance/alarms

/configurations/

engineering para.Capture test data

AnalysisResult

sharing

RAN autoconfigurationconsole

Summary


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Summary

UMTS NetworkOptimization

To provide a more competitive

network for OperatorTo provide better quality of

experience for Subscribers

Trade-off between optimized

coverage, capacity, quality

Ongoing optimization acrossnetwork life cycle


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11 Wcdma Rnp&Rno Conspectus

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